Artifact collections with large numbers of small files take forever to copy

It appears from looking at log files that each individual file in an artifact collection is transmitted as a single JMS message. This isn't particularly great for a lot of our plans, where we copy over a hierarchy of JUnit HTML and Clover HTML reports. They can take many minutes to copy the artifacts (where artifact copying takes far longer than the actual build itself).

Would it be possible to batch up artifact copying in some way to reduce the length of time it takes to copy large numbers of small files?